Leno loom



June 23, 1925.

J. SA BACHMAN 'ET AL LENG LOOM Filed Jan. 14. 1924 2 Sheets-Sheet l IN VEN TOR S MW S M l, W, W

A TTORNE YS June 23, 1.925. 1,543,045

J. S. BACHMAN ET AL f LENG LOOM Filed Jan, 14, 1924 2 Sheets-Sheet 2INVENTOR J 33am/707m A TTORNE YS Patented .lime 23, 1925.

IITE D TS T-,ATES

JOHN sNELGnowf-BACHMAN, SIDNEYARTHUR ivioiimnivi) STARLING ciia'is'rornnLEWIS. or aoMneEoiaGiA. l n

LENO LOOM.

iippiicationvfnea January. i4, 1924. sei-iai-nacse-,oea

To all 107mm t may concern.'

Be it known that we, JOHN "SNnLGRow BACHMAN, SIDNEY ARTHUR MOAK, randlSTARLiNG Ciinis'roriin Lnwis, citizens ofthe United States, .andresidents of Romain.

ly shifting certain. of tlieliea'lds whereby j certain ofthe Warpthreadsare twisted with other warp threads for-locking. thepicks inposition, the 'locking ofl the picks inl the socalled .knityfabric/being essential 'in View of the loose lweave.

A further object ofzthe invention is the provision of a device adaptedto be attached to al plain or common.twoeliarness loom forv laterally:shifting certain of the yliealds while permitting a vertical oscillationof the same whereby leno-tubing is.' formed,I4 the remainingl healdsbeing maintained stationaryV to supportaslied of warp threads in.stationary position.

This .invention `will be-'best understood from a .consideration of thefollowing detailed description, in view of the accompaiiying drawing:forming a part of the specification; nevertheless it. is to beunderstood that the invention is not confined to the disclosure, being'susceptible i of lsuch changes and niodicationswhich shall define no.material departure Afrom the salient. features ofthe .invention VaseXpressedfin the appended claims.

In the drawings:

Figure 1 is :a4 view in perspective of 'a two-harness loom-showing ourinvention applied for laterally `shiftinga pair Iofthe liealds. I

Figure 2 is a view in perspective looking towardsv the 'rear kof the`machine disclosing oscillating mechanism for certain of the healds.

Figure 3 is a section through thevertical diameter of the operating gearfor the shifting mechanism.

Figure et is a view in perspective of a leno locmshowing our attachmentapplied in operative position with thesame.

-Beferring more particularly tothe drawings, 1- designates `Ia frame vofa loomliavfing a camshaft 2mouiited inlbearings on f the frame anddriven in .anyap-proved manner. The Vouter projecting end oftlie shaft'is' provided withfa. spur gear 3 having acolf Alar f4 integrally.formed:.tlierewitli. screw 5 locks the collar'and likewise the e tolthe shaft- 2.

A set gear ln mesh with the gear Bris a spur gear 6, the ratio of thegear 6 to the gear B being witlra stud 8 'disposed -eccentrically withres/Dect to theY Shaft 7. v'llhestudLS1-islad` justable in aslot 9Minthe ,gearJGand .isprovided with ahead 11 aiidxan annularrshoulder12spaced. from therhead witlitheshouldery in engagement with` the. facelofthe gear 6. The outer end of the stud is threaded and engaged bya nut13 for. securing the stud ina predetermined position within the 65 Gearisimounted on astudc shaft 7 yconnected to the `iframe 1 land isprovidedslot ISand awnut 141locksthe'nut 13: against displacement. lAfveitically disposed oscillating rodl has its -lower end.enlargedtandslottedw'as shown at -1'6- Vto :receive the cra-nk `pin i orstud '8 ywith the enlarged portio'n'ieceived between the head andthevshoulder 12 of said stud. VThe upper end yof the. rod 151is:connected -byineans of a= turn-buckle 17 to an2. a=lined reciprocatingrod'lS.

The rod 15 is maintained in position when reciprocating by means of aslotted lbracket 19-secured to one -side wallr of the frame while rod 18lissimilarly `maintained in position by means of a slottedxbracketf20like Wise secured to theI side wall of thefframe 1 and in alinement withthebracket. 19. The.

upper end of the rod 18fisfpivotally connectedat21 to aroclr'lever 22which is pivoted at 23 to a bracket varm v211, Asaid bracket arm :beingsecured'to thei-nner wall of the side frame 'ofthesupportingstruc tureofy the'loom. The lowerend 25 ofthe rocklever22 is provided with .ailplurality of perforatioiis l26 adapted to receive the pivot Vpin 23 foryadjusting the throw of the said prongs are perforated to receive a pin29. This pin rides in a slot in a bar 3l which is rigid-ly secured at 32to a vertically oscillating heald 33. The pin 29-passes through a secondslotted bar 34 which is rigidly secured at 35 to a second verticallyoscillating heald 36.

Slotted bars 37 are rigidly secured to a transverse bar 39 which isconnected to the side members of the frame 1 and located above astationary heald 39. The stationary heald 39 is secured to the bars 37and is adapted to be adjusted manually and vertically through theslotted bars 37. A fourth heald 41 is secured to bars similar to theslotted bars 37 which are adjustably connected to a second transversebar 43. The second transverse bar is likewise rigidly secured tol theside members of the frame l.

The intermediate healds 33 and 36 are bolted together and connected bymeans of straps 44 to the boss rollers 50. The skeleton harness frame 53is also connected by means of straps 51 to the boss rollers 50.Intermediate harness and skeleton harness are vertically reciprocated.by means of regular two-harness cams operated by the earn shaft 2.

The shed of warp threads comprise two sets of stationary sheds and twosets of movable sheds, the movable sheds being carried by theoscillating healds 33 and 36. Shed 45 is carried by the stationary heald39 while shed 46 is controlled, by heald 33; shed 47 is controlled byoscillating heald 36 while shed 48 is controlled by the stationary heald4l. A reed or beater 49 receives the warp threads of the four sheds andis adapted to beat the picks 52 in position in the usual manner. Theusual form of shuttle is employed for carrying the picks back andforth.V

The operation of our device is as follows:

The adjustment of the lever 22 by means of the pin 23 and theperforation 26 and likewise the adjustment of the throw of the lever bymeans of the turn-buckle 17 is dependent upon the size and the kind ofloom. employed and likewise upon the kind or design of materials it isintended to manufacture. The healds 33 and 36 are bolted together andvertically reciprocated with the skeleton harness in the usual mannerWhile the healds 39 and 4l remain stationary and therefore the shed 46controlled by heald 33 is moved upand down in the usual manner forcrossing the wanp` threads of said shed with the warp threads of shed 45in a vertical plane to lock the picks 52 in position while movable shed47 cooperates with the stationary shed 48 for crossing the warp threadsvertically and locking the picks in position. It will be seen that bythe usual operation of the healds and the Vlower portion of the tubing.

ln order to lock the picks 52 in a predetermined position, we shift thehealds 33 and 36 laterally of the machine, thereby horizontally crossingthe warp threads of shed 46 with warp threads of shed 457 while the warpthreads of shed 47 are crossed horizontally with the warp threads ofshed 48.

The gear 3 meshing with gear 6 drives the last mentioned gear andthrough the crank pin 8 causes vertical reciprocat-ion of the alined andconnected rods l5 and 1,8 thereby oscillating the rock lever 22. Thefork at the lower end of the arm 25 of said lever oscillates laterallyand in a horizontal manner and therefore shifts the healds 33 and 36 ina horizontal manner for crossing the warp threads of the various shedsas has been previously explained.

The slotted connectingvmembers 3l and 34 of the respective healds 33 and36 permit the connecting members to rise vertically on the pin 29 whileoscillation of the lever 22 causes a lateral shifting of the healds 33and 36. The oscillating lever 22 shifts the healds 33 and 36 andtherefore the warp threads carried by said healds in the working harnessfrom first one side to the other of the threads in the stationaryharness thereby crossing the warp threads between each pick of thefilling. The loom in this case delivers two picks to one stroke of theoscillator 22, one pick crossing thel endsof the front working harnesswith the ends of the front stationary harness thereby weaving the upperside of the tube. The neXt pick crosses the ends of the back workingharness or heald 4l thereby weaving the lower side of the tubing. Thenext stroke of the oscillator in the opposite direction gives the sameresults but in the opposite direction so that the warp threads of theshifting healds cross an adjacent warp thread of the stationary healdsand then upon the return stroke of the shiftable warp threads aretransposed diagonally across the other adjacent warpthread. .lt will beseen that the loom delivers four picks to one complete movement of theoscillator.

Heald 39 is located at a sufficient elevation to form the top shed oftube and heald 4l is located below heald 39 to properly form the lowerside of the tube.

In order that the threads of sheds 46 and 47 may be crossed horizontallyover the threads of the respective sheds 45 and 48, healds 33 and 39cooperating to form the top of the leno tube are each provided with aneXtra space between each needle eye. The threads from healds 36 and 4lare drawn llO needle eye and the threads from healds 33 and 39 are drawnthrough said spaces.

The needle eyes of healds- 39 and 36 point upward while the needle eyesof and-41 Y point downward. lThese eyes are not shown on the drawingssince suoli a construction is well known in the art.V

Vhat we claim is: f

In a leno loom, the combination with ver,-

tical reciprocating healds land stationaryv healds, means tor causingshitting ot the reciprocating healds, said means comprising a rod havingan enlargement at its lower end, said enlargement being provided with ahor1- vzontal slot, a drive gear, a pin on the gear received by theslot, a lever having an adjustable pivotalvmounting vintermediate .its

lends, one end ot the lever being connected with the rod, a yoke at theopposite end of the lever having armsprojecting laterally and 'theninwardly and with an arm connected with a heald for causing simultaneouslateral shitting of the vreciprocating healds kand means for maintainingthe stationary healds in position while the reciprocating healds areshifted laterally between said stationary healds.

JOHN SNELGRO'VV BACHMAN. SIDNEY ARTHUR MOAK. STARLING CHRISTOPER LEVIS.

